Many people work hard to make their handwriting clear and even classic. This article has nothing to say to them, since their handwriting is not somehow "natural." Like most pop psychology, it's largely BS.

What if those people's drive to make their writing clear and classic is BECAUSE they have these listed characteristics? As a left-handed person, I've worked my whole life to write clearly and precisely in order to avoid even more unwanted commentary on my natural writing style than I already got, yet the chart still describes me fairly well. Just happenstance I guess.